CN101445637A - Preparation method of nano SiO2/ACR composite particles and application thereof - Google Patents
Preparation method of nano SiO2/ACR composite particles and application thereof Download PDFInfo
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Abstract
The invention discloses a preparation method of nano SiO2/ACR composite particles and application thereof. The method comprises the following steps: adopting ultrasonic to assisting in pre-emulsifying a monomer, and taking an anionic/nonionic compound emulsifier as the emulsifier; taking ethyl acrylate as the monomer to prepare seed latex; taking butyl methacrylate and the ethyl acrylate as the monomers and a compound crossinking agent consisting of N,N'-methylene bisacrylamide (BIS) and a compound CH2=CHRCH2COOR' to prepare an inner core; taking the methyl methacrylate and the butyl methacrylate as the monomers and the compound crosslinking agent consists of the BIS and the CH2=CHRCH2COOR' to prepare a shell; adding nano SiO2 emulsion which is modified by soft water and a siloxane coupling agent while preparing the shell so that SiO2 produces a grafting reaction at the shell of core-shell polyacrylate (ACR); and finally obtaining the nano SiO2/ACR composite particles with excellent impact resistance and the like. The prepared composite particles are applied to preparing PVC as an impact modifier, and have excellent impact resistance, good dispersivity and good mechanical properties.
Description
Technical field
The present invention relates to a kind of nanometer SiO
2The preparation method of/ACR composite particles and the application in the PVC modifying plastics thereof.
Background technology
Polyvinyl chloride (PVC) plastics have advantages such as intensity height, light weight, are widely used in industries such as building, decoration, household electrical appliances, toy.On the other hand, because PVC exists performances such as shock resistance, thermostability, weathering resistance often can not satisfy the demand, so when being processed into goods, need add auxiliary agents such as anti-impact modifier, thermo-stabilizer, antioxidant.Nucleocapsid structure polyacrylic ester (ACR) is the hud typed multipolymer with lower glass transition temperatures kernel, high glass-transition temperature shell that obtains by monomeric letex polymerizations such as polyacrylic ester, polystyrene, have performances such as excellent shock resistance, weathering resistance, promotion plasticizing, be widely used in being considered to the development trend of anti-impact modifier in the various PVC plastics.Abroad, ACR has become main anti-impact modifier product, and at home, owing to wait other anti-impact modifiers to compare with CPE (chlorinatedpolyethylene), ACR starts late and causes technology maturity not high, and price is higher relatively, so ACR class anti-impact modifier still is in developmental stage, the ratio that accounts for like product is also less, also has bigger development space.Based on the performances and the aim that reduces product cost such as shock resistance of further raising ACR, by adding CaCO
3, SiO
2Deng inorganic nano-particle, preparing the nano combined anti-impact modifier of inorganic/ACR becomes one of the important development direction in fields such as modifying plastics, functional plastics.For example, bibliographical information adopts the synthetic nanometer CaCO with nucleocapsid structure of seed emulsion polymerization
3/ ACR compounded latex, with itself and PVC blend, nano-complex particle has reached the nano level dispersion in PVC matrix, in addition, coupling agent kind, stratum nucleare and shell monomers than, shell monomers than all its shock resistance being had a significant effect.Nanometer CaCO
3After the butyl acrylate surface treatment, grind processing altogether with ACR again and can improve nanometer CaCO effectively
3And the bonding interface between the polymkeric substance strengthens its bonding interface, helps improving the mechanical property of compound system.
Silicon-dioxide more and more comes into one's own as the matrix material component or as the altered contents of general-purpose plastics, with nanometer SiO
2Particle carries out the in-situ emulsion polymerization of polyacrylic ester as seed, and the silicon-dioxide that obtains/polyacrylic acid ester complexes and polyvinyl chloride resin blend have better enhancing, toughening effect than the material with virgin pp acid esters and polyvinyl chloride resin blend.To nanometer SiO
2Particle carries out the coupling modification, can improve clad ratio and the percentage of grafting of ACR to nanoparticle, and the dispersiveness of composite particles in PVC is better than nanometer SiO
2Particle, composite particles obviously is better than nanometer SiO to the toughening effect of PVC
2Particle and simple ACR.With initiator 2,2 '-azo (2-amidine propane) dihydrochloride (AIBA) is adsorbed in the nanometer SiO that is dispersed in aqueous phase
2Particle surface carries out the letex polymerization of butyl acrylate as seed latex, has prepared PBA/ nanometer SiO
2Composite polymer particle obtains shaggy composite particles, SiO in composite particles
2During massfraction 15-23%, 60% SiO
2Be enriched in particle surface, 30% SiO
2Be coated on particle inside.
Chinese patent 200510038154.0 discloses a kind of nanometer SiO
2The preparation method of/acrylate composite emulsion is earlier with inorganic SiO
2Carry out surface treatment, adopt then in-situ emulsion polymerization or seeded emulsion polymerization synthetic have the molecular level compound inorganic/the high molecular nanometer composite emulsion, the inorganic 0.1-5% that accounts for gross weight mutually, the tensile strength and the elongation at break of emulsion film are multiplied.Chinese patent 200510045707.5 is with silane coupled SiO
2Be scattered in the toluene solution, carry out graft polymerization by initiator A IBN initiation butyl acrylate and obtain compounded latex.SiO with particle diameter 70-340nm
2Particle electrostatic adhesion initiator, the re-initiation monomer polymerization obtains the nucleocapsid structure latex of surface recombination polymethylmethacrylate, also can be by emulsifier-free emulsion polymerization preparation parcel nanometer SiO
2The matrix material of particle.
Summary of the invention
The invention provides a kind of nanometer SiO
2The preparation method of/ACR composite particles: form compound emulsifying agent with aniorfic surfactant (in Sodium dodecylbenzene sulfonate, sodium lauryl sulphate, the sodium alkyl naphthalene sulfonate a kind of)/nonionic surface active agent (in class of department 60, alkylphenol polyoxyethylene, the fatty alcohol-polyoxyethylene ether a kind of), adopt the ultrasonic emulsification monomer methods.As monomer, Potassium Persulphate (KPS) prepares seed latex as initiator with ethyl propenoate; On the seed latex basis, the stratum nucleare that preparation has lower glass transition temperatures is a monomer with butyl methacrylate and ethyl propenoate, N, and N '-methylene-bisacrylamide and homemade molecular formula are CH
2=CHRCH
2(R is main chain C to COOR '
4～C
12Alkyl, R ' is C
1～C
4Alkyl) compound form multiple crosslinking agent, Potassium Persulphate (KPS) is as initiator; With methyl methacrylate, butyl methacrylate is monomer, and homemade molecular formula is CH
2=CHRCH
2(R is main chain C to COOR '
4～C
12Alkyl, R ' is C
1～C
4Alkyl) bifunctional compound be linking agent, Potassium Persulphate (KPS) is as initiator, adds through soft water, the coupling agent modified nanometer SiO of siloxanes in the shell preparation feedback
2Emulsion; After reacting completely, spray-dried, obtain nanometer SiO
2/ ACR matrix material.Particular content comprises the steps:
(1) adopts mechanical stirring and ultrasonic auxiliary pre-emulsion reaction monomer, obtain the pre-emulsion of low levels compound emulsifying agent;
(2) with ethyl propenoate as monomer, Potassium Persulphate (KPS) is as initiator, the preparation seed latex;
(3) on the seed latex basis, be monomer with butyl methacrylate, ethyl propenoate, N, N '-methylene-bisacrylamide and CH
2=CHRCH
2(R is main chain C to COOR '
4～C
12Positive alkyl, R ' is C
1～C
4Alkyl) form multiple crosslinking agent, Potassium Persulphate (KPS) is as initiator, the kernel that preparation has lower glass transition temperatures;
(4) be monomer with methyl methacrylate, butyl methacrylate, N, N '-methylene-bisacrylamide and CH
2=CHRCH
2(R is main chain C to COOR '
4～C
12Positive alkyl, R ' is C
1～C
4Alkyl) form multiple crosslinking agent, Potassium Persulphate (KPS) is as initiator, preparation has the shell of high glass-transition temperature;
(5) in the shell preparation feedback, add through soft water, the coupling agent modified nanometer SiO of siloxanes
2Emulsion makes SiO
2Carry out graft reaction on hud typed polyacrylic ester surface;
(6) react completely and spray-dried, obtain nanometer SiO
2/ ACR composite particles.
Compound emulsifying agent described in the above-mentioned steps (1) is by a kind of composition the in class of a kind of and nonionogenic tenside department in aniorfic surfactant Sodium dodecylbenzene sulfonate, sodium lauryl sulphate, the sodium alkyl naphthalene sulfonate 60, alkylphenol polyoxyethylene, the fatty alcohol-polyoxyethylene ether; Anion surfactant and nonionogenic tenside mass ratio are 50:50～90:10, the composite emulsifying agent content is 0.5%～2% of a monomer mass in the seed latex preparation, the compound emulsifying agent consumption is 0.1%～1% of a monomer mass in the kernel preparation, and the compound emulsifying agent consumption is 0.05%～1% of a monomer mass in the shell preparation.
In the preparation of seed latex described in the above-mentioned steps (2), as monomer, the seed latex monomer mass is 0.2%～1% of all reaction monomers quality with ethyl propenoate, and Potassium Persulphate (KPS) is as initiator, and consumption is 0.1%～0.5% of a monomer mass.
In the preparation of kernel described in the above-mentioned steps (3), be monomer with butyl methacrylate and ethyl propenoate, butyl methacrylate and ethyl propenoate mass ratio are 65:35～95:5, N, and N '-methylene-bisacrylamide and homemade molecular formula are CH
2=CHRCH
2(R is main chain C to COOR '
4～C
12Alkyl, R ' is C
1～C
4Alkyl) compound form multiple crosslinking agent, the multiple crosslinking agent consumption is 0.02%～0.1% of a monomer mass, N, N '-methylene-bisacrylamide and CH
2=CHRCH
2COOR ' mass ratio is 70:30～90:10, and Potassium Persulphate (KPS) initiator amount is 0.05%～0.3% of a monomer mass.
In the shell preparation described in the above-mentioned steps (4), with methyl methacrylate, butyl methacrylate is monomer, methyl methacrylate and butyl methacrylate mass ratio are 70:30～95:5, N, and N '-methylene-bisacrylamide and homemade molecular formula are CH
2=CHRCH
2(R is main chain C to COOR '
4～C
12Alkyl, R ' is C
1～C
4Alkyl) compound form multiple crosslinking agent, the multiple crosslinking agent consumption is 0.1%～0.6% of a monomer mass, N, N '-methylene-bisacrylamide and CH
2=CHRCH
2COOR ' mass ratio is 10:90～30:70, and Potassium Persulphate (KPS) initiator amount is 0.05%～0.1% of a monomer mass; Kernel and capsomere mass ratio are 90:10～80:20, nanometer SiO
2Quality is 5%～20% of all monomer masses.
Nanometer SiO described in the above-mentioned steps (5)
2Particle diameter be 20～40nm, the siloxanes coupling agent is a kind of in gamma-amino propyl trimethoxy silicane, γ-An Jibingjisanyiyangjiguiwan, second diamino propyl trimethoxy silicane, vinyl three (2-methoxyethoxy) silane, the vinyltriethoxysilane, and the siloxanes consumption is nanometer SiO
20.2%～2% of quality.
The nanometer SiO of above-mentioned preparation
2/ ACR composite particles is as the application of anti-impact modifier in preparation PVC.
It is also spray-dried to react completely, and obtains nanometer SiO
2/ ACR composite particles, the SiO of composite particles particle diameter between 120nm～150nm
2/ ACR particle accounts for more than 90%, is used for the PVC plastics and has performances such as excellent anti impact, enhancing.
The invention has the beneficial effects as follows by monomeric ultrasonic nanometer SiO that assists pre-emulsification, seeded emulsion polymerization and have reactive group in the adding of the later stage of nucleocapsid structure ACR preparation through surface modification such as acrylate
2Particle makes the shell effecting reaction of itself and ACR, obtains having high-content kernel and ACR surface grafting SiO
2SiO
2/ ACR composite particles as the PVC anti-impact modifier, is not only given its excellent shock resistance, has good dispersiveness and mechanical property etc. simultaneously.
Embodiment
Embodiment one:
(1) mechanical stirring and ultrasonic auxiliary pre-emulsion reaction monomer: Sodium dodecylbenzene sulfonate/alkylphenol polyoxyethylene (mass ratio is 70:30), the composite emulsifying agent content is 1.5% of a monomer mass in the seed latex preparation, the compound emulsifying agent consumption is 0.4% of a monomer mass in the kernel preparation, and the compound emulsifying agent consumption is 0.1% of a monomer mass in the shell preparation;
(2) seed latex preparation: as monomer, be 0.6% of all reaction monomers quality with ethyl propenoate, Potassium Persulphate (KPS) initiator amount is 0.3% of a monomer mass;
(3) kernel preparation: monomer mass is than butyl methacrylate: ethyl propenoate is 80:20, and the multiple crosslinking agent consumption is 0.08% of a monomer mass, wherein, and N, N '-methylene-bisacrylamide: CH
2=CHRCH
2(R is n-C to COOR '
10H
21, R ' is-CH
3) mass ratio is 70:30, Potassium Persulphate (KPS) initiator amount is 0.1% of a monomer mass;
(4) nanometer SiO
2Modification: with soft water preparation nanometer SiO
2Emulsion adds the siloxanes coupling agent, and the wet-milling post-heating makes modified Nano SiO
2Emulsion.SiO
2Particle diameter be 20-40nm, the siloxanes coupling agent is the gamma-amino propyl trimethoxy silicane, consumption is nanometer SiO
21.2% of quality;
(5) shell preparation and and nanometer SiO
2Grafting: capsomere methyl methacrylate: the butyl methacrylate mass ratio is 80:20, kernel: the capsomere mass ratio is 90:10, and the multiple crosslinking agent consumption is 0.5% of a monomer mass, N wherein, N '-methylene-bisacrylamide: CH
2=CHRCH
2(R is n-C to COOR '
10H
21, R ' is-CH
3) mass ratio is 30:70, Potassium Persulphate (KPS) initiator amount is 0.06% of a monomer mass; Add through soft water, the coupling agent modified nanometer SiO of siloxanes in the time of the shell preparation feedback
2Emulsion makes SiO
2Carry out graft reaction, nanometer SiO on hud typed polyacrylic ester surface
2Add-on is 16% of all monomer masses.
(6) react completely and spray-dried, obtain nanometer SiO
2/ ACR matrix material.
Embodiment two:
(1) compound emulsifying agent sodium alkyl naphthalene sulfonate/class of department 60 mass ratioes are 80:20, the composite emulsifying agent content is 1.0% of a monomer mass in the seed latex preparation, the compound emulsifying agent consumption is 0.5% of a monomer mass in the kernel preparation, and the compound emulsifying agent consumption is 0.06% of a monomer mass in the shell preparation;
(2) the ethyl propenoate monomer is 0.5% of all reaction monomers quality, and Potassium Persulphate (KPS) is 0.3% of a monomer mass as initiator amount;
(3) monomer mass is than butyl methacrylate: ethyl propenoate is 70:30, and the multiple crosslinking agent consumption is 0.06% of a monomer mass, wherein, and N, N '-methylene-bisacrylamide: CH
2=CHRCH
2(R is n-C to COOR '
8H
17, R ' is n-C
4H
9) mass ratio is 80:20, Potassium Persulphate (KPS) initiator amount is 0.2% of a monomer mass;
(4) the siloxanes coupling agent is a second diamino propyl trimethoxy silicane, and consumption is nanometer SiO
21.6% of quality;
(5) methyl methacrylate: the butyl methacrylate mass ratio is 90:10, kernel: the capsomere mass ratio is 80:20, and the multiple crosslinking agent consumption is 0.4% of a monomer mass, wherein, and N, N '-methylene-bisacrylamide: CH
2=CHRCH
2(R is n-C to COOR '
8H
17, R ' is n-C
4H
9) mass ratio is 20: 80, Potassium Persulphate (KPS) initiator amount is 0.08% of a monomer mass, nanometer SiO
2Add-on is 12% of all monomer masses.
Other is with embodiment one.
Embodiment three:
(1) compound emulsifying agent Sodium dodecylbenzene sulfonate/fatty alcohol-polyoxyethylene ether mass ratio is 60:40, the composite emulsifying agent content is 1.3% of a monomer mass in the seed latex preparation, the compound emulsifying agent consumption is 0.3% of a monomer mass in the kernel preparation, and the compound emulsifying agent consumption is 0.05% of a monomer mass in the shell preparation;
(2) the ethyl propenoate monomer is 0.8% of all reaction monomers quality, and Potassium Persulphate (KPS) is 0.4% of a monomer mass as initiator amount;
(3) monomer mass is than butyl methacrylate: ethyl propenoate is 90:10, and the multiple crosslinking agent consumption is 0.05% of a monomer mass, wherein, and N, N '-methylene-bisacrylamide: CH
2=CHRCH
2(R is n-C to COOR '
12H
25, R ' is n-C
2H
5) mass ratio is 70:30, Potassium Persulphate (KPS) initiator amount is 0.16% of a monomer mass;
(4) the siloxanes coupling agent is a vinyltriethoxysilane, and consumption is nanometer SiO
21.0% of quality;
(5) methyl methacrylate: the butyl methacrylate mass ratio is 90:10, kernel: the capsomere mass ratio is 90:10, and the multiple crosslinking agent consumption is 0.4% of a monomer mass, wherein, and N, N '-methylene-bisacrylamide: CH
2=CHRCH
2(R is n-C to COOR '
12H
25, R ' is n-C
2H
5) mass ratio is 25:75, Potassium Persulphate (KPS) initiator amount is 0.1% of a monomer mass, nanometer SiO
2Add-on is 15% of all monomer masses.
Other is with embodiment one.
Embodiment four:
(1) compound emulsifying agent sodium lauryl sulphate/fatty alcohol-polyoxyethylene ether mass ratio is 85:15, the composite emulsifying agent content is 1.7% of a monomer mass in the seed latex preparation, the compound emulsifying agent consumption is 0.5% of a monomer mass in the kernel preparation, and the compound emulsifying agent consumption is 0.07% of a monomer mass in the shell preparation;
(2) the ethyl propenoate monomer is 1% of all reaction monomers quality, and Potassium Persulphate (KPS) is 0.5% of a monomer mass as initiator amount;
(3) monomer mass is than butyl methacrylate: ethyl propenoate is 85:15, and the multiple crosslinking agent consumption is 0.04% of a monomer mass, wherein, and N, N '-methylene-bisacrylamide: CH
2=CHRCH
2(R is n-C to COOR '
12H
25, R ' is n-CH
3) mass ratio is 85:15, Potassium Persulphate (KPS) initiator amount is 0.24% of a monomer mass;
(4) the siloxanes coupling agent is a second diamino propyl trimethoxy silicane, and consumption is nanometer SiO
21.8% of quality;
(5) methyl methacrylate: the butyl methacrylate mass ratio is 85:15, kernel: the capsomere mass ratio is 85:15, and the multiple crosslinking agent consumption is 0.2% of a monomer mass, wherein, and N, N '-methylene-bisacrylamide: CH
2=CHRCH
2(R is n-C to COOR '
12H
25, R ' is n-C
2H
5) mass ratio is 25:75, Potassium Persulphate (KPS) initiator amount is 0.07% of a monomer mass, nanometer SiO
2Add-on is 10% of all monomer masses.
Other is with embodiment one.
Comparative example:
(1) mechanical stirring and ultrasonic auxiliary pre-emulsion reaction monomer: Sodium dodecylbenzene sulfonate/alkylphenol polyoxyethylene (mass ratio is 70:30), the composite emulsifying agent content is 1.5% of a monomer mass in the seed latex preparation, the compound emulsifying agent consumption is 0.4% of a monomer mass in the kernel preparation, and the compound emulsifying agent consumption is 0.1% of a monomer mass in the shell preparation;
(2) seed latex preparation: as monomer, be 0.6% of all reaction monomers quality with ethyl propenoate, Potassium Persulphate (KPS) initiator amount is 0.3% of a monomer mass;
(3) kernel preparation: monomer mass is than butyl methacrylate: ethyl propenoate is 80:20, and the multiple crosslinking agent consumption is 0.08% of a monomer mass, wherein, and N, N '-methylene-bisacrylamide: CH
2=CHRCH
2(R is n-C to COOR '
10H
21, R ' is-CH
3) mass ratio is 70:30, Potassium Persulphate (KPS) initiator amount is 0.1% of a monomer mass;
(4) shell preparation: the capsomere methyl methacrylate: the butyl methacrylate mass ratio is 80:20, kernel: the capsomere mass ratio is 90:10, and the multiple crosslinking agent consumption is 0.5% of a monomer mass, N wherein, N '-methylene-bisacrylamide: CH
2=CHRCH
2(R is n-C to COOR '
10H
21, R ' is-CH
3) mass ratio is 30:70, Potassium Persulphate (KPS) initiator amount is 0.06% of a monomer mass;
(5) react completely and spray-dried, obtain nucleocapsid structure ACR particle.
The invention process effect and application performance effect
The foregoing description and comparative example product are used for complex compounding (prescription the sees Table 1) sample preparation of PVC, carry out following performance test respectively:
Shock strength test: be cut into the test with notched test piece batten by the GB/T1043-93 standard with omnipotent sampling machine, place after 24 hours, adopt the charpy impact test machine to carry out impact test (probe temperature: 23 ℃).
Erichsen test: be cut into the dumbbell shaped tensile bars by the GB/T1040-92 standard, use electronics universal tensile testing machine test bars tensile strength down at 23 ℃, draw speed is 20mm/min.
Vicat softening point test: test by the GB1633-79 standard-required.
Test result is as shown in table 2.
Table 1 the invention process effect test recipe
Table 2 the invention process effect
Claims (7)
1, a kind of nanometer SiO
2The preparation method of/ACR composite particles is characterized in that comprising the steps:
(1) adopts mechanical stirring and ultrasonic auxiliary pre-emulsion reaction monomer, obtain the pre-emulsion of low levels compound emulsifying agent;
(2) with ethyl propenoate as monomer, Potassium Persulphate (KPS) is as initiator, the preparation seed latex;
(3) on the seed latex basis, be monomer with butyl methacrylate, ethyl propenoate, N, N '-methylene-bisacrylamide and CH
2=CHRCH
2(R is main chain C to COOR '
4～C
12Positive alkyl, R ' is C
1～C
4Alkyl) form multiple crosslinking agent, Potassium Persulphate (KPS) is as initiator, the kernel that preparation has lower glass transition temperatures;
(4) be monomer with methyl methacrylate, butyl methacrylate, N, N '-methylene-bisacrylamide and CH
2=CHRCH
2(R is main chain C to COOR '
4～C
12Positive alkyl, R ' is C
1～C
4Alkyl) form multiple crosslinking agent, Potassium Persulphate (KPS) is as initiator, preparation has the shell of high glass-transition temperature;
(5) in the shell preparation feedback, add through soft water, the coupling agent modified nanometer SiO of siloxanes
2Emulsion makes SiO
2Carry out graft reaction on hud typed polyacrylic ester surface;
(6) react completely and spray-dried, obtain nanometer SiO
2/ ACR composite particles.
2, preparation method as claimed in claim 1 is characterized in that: the compound emulsifying agent described in the above-mentioned steps (1) is by a kind of composition the in class of a kind of and nonionogenic tenside department in aniorfic surfactant Sodium dodecylbenzene sulfonate, sodium lauryl sulphate, the sodium alkyl naphthalene sulfonate 60, alkylphenol polyoxyethylene, the fatty alcohol-polyoxyethylene ether; Anion surfactant and nonionogenic tenside mass ratio are 50:50～90:10, the composite emulsifying agent content is 0.5%～2% of a monomer mass in the seed latex preparation, the compound emulsifying agent consumption is 0.1%～1% of a monomer mass in the kernel preparation, and the compound emulsifying agent consumption is 0.05%～1% of a monomer mass in the shell preparation.
3, preparation method as claimed in claim 1, it is characterized in that: in the preparation of seed latex described in the step (2), with ethyl propenoate as monomer, the seed latex monomer mass is 0.2%～1% of all reaction monomers quality, Potassium Persulphate (KPS) is as initiator, and consumption is 0.1%～0.5% of a monomer mass.
4, preparation method as claimed in claim 1, it is characterized in that: in the preparation of kernel described in the step (3), with butyl methacrylate and ethyl propenoate is monomer, butyl methacrylate and ethyl propenoate mass ratio are 65:35～95:5, N, N '-methylene-bisacrylamide and homemade molecular formula are CH
2=CHRCH
2(R is main chain C to COOR '
4～C
12Alkyl, R ' is C
1～C
4Alkyl) compound form multiple crosslinking agent, the multiple crosslinking agent consumption is 0.02%～0.1% of a monomer mass, N, N '-methylene-bisacrylamide and CH
2=CHRCH
2COOR ' mass ratio is 70:30～90:10, and Potassium Persulphate (KPS) initiator amount is 0.05%～0.3% of a monomer mass.
5, preparation method as claimed in claim 1, it is characterized in that: in the shell preparation described in the step (4), with methyl methacrylate, butyl methacrylate is monomer, methyl methacrylate and butyl methacrylate mass ratio are 70:30～95:5, N, N '-methylene-bisacrylamide and homemade molecular formula are CH
2=CHRCH
2(R is main chain C to COOR '
4～C
12Alkyl, R ' is C
1～C
4Alkyl) compound form multiple crosslinking agent, the multiple crosslinking agent consumption is 0.1%～0.6% of a monomer mass, N, N '-methylene-bisacrylamide and CH
2=CHRCH
2COOR ' mass ratio is 10:90～30:70, and Potassium Persulphate (KPS) initiator amount is 0.05%～0.1% of a monomer mass; Kernel and capsomere mass ratio are 90:10～80:20, nanometer SiO
2Quality is 5%～20% of all monomer masses.
6, preparation method as claimed in claim 1 is characterized in that: the nanometer SiO described in the step (5)
2Particle diameter be 20～40nm, the siloxanes coupling agent is a kind of in gamma-amino propyl trimethoxy silicane, γ-An Jibingjisanyiyangjiguiwan, second diamino propyl trimethoxy silicane, vinyl three (2-methoxyethoxy) silane, the vinyltriethoxysilane, and the siloxanes consumption is nanometer SiO
20.2%～2% of quality.
7, the prepared nanometer SiO of a kind of claim 1
2/ ACR composite particles is as the application of anti-impact modifier in preparation PVC.
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| CN102485790A (en) * | 2010-12-02 | 2012-06-06 | 广东高科达科技实业有限公司 | Method for preparing SiO2/ACR nano composite material |
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2008
- 2008-12-23 CN CN2008102203039A patent/CN101445637B/en not_active Expired - Fee Related
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